How to create a new field in a bean from module Notes?

I am using a module called notes to keep track of emails so that I can view both emails and notes in the sugar portal.  Right now the portal is only set up to view the notes associated with a case and not emails. Our work around to this is going to be to create a new note whenever there is an existing case and an email is sent.

I need to know if I can create a new field in a notes bean.  I know that I can create variables to use in a bean on the fly but when I did a save I don't see it in the database as a new column.

How do I use a bean to create a new column in the database?